Brushing device with illumination features

ABSTRACT

The present disclosure relates to an oral cleansing device with illumination features. In one example, the device includes a housing including an aperture, such as a button aperture, defined therethrough, a diffuser connected to the housing and configured to span over the aperture. The device also includes a blocking member positioned over a portion of the diffuser and connected thereto and a lighting array received within the housing and at least partially aligned with the blocking member such that light emitted from the lighting array is transmitted to an exterior of the housing by traveling around the blocking member and through the diffuser.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priority to U.S. Provisional No.62/435,053 entitled “Motion Activated Brushing Device,” which isincorporated by reference herein in its entirety. The application isalso related to U.S. patent application Ser. No. 15/206,013 (U.S. Pub.No. 2017/0007384), filed on Jul. 8, 2016 entitled “Oral Cleansing Devicewith Energy Conservation,” which is hereby incorporated by referenceherein in its entirety for any and all purposes.

TECHNICAL FIELD

The present disclosure relates to oral health products, such astoothbrushes, oral irrigators, and the like.

BACKGROUND

Oral cleansing devices, such as toothbrushes, oral irrigators, and morerecently, combination brushing and irrigating devices are often part ofthe daily oral health routine. Daily use requires that these devices beefficient and/or rechargeable. Recent regulations regarding idle powerconsumption of household electronic devices require that these devicesbe placed in a low power or standby mode. Thus, such devices typicallyenter into a low-power mode when idle or when they are being recharged,for example, when they are placed in a recharging cradle. Although a lowpower mode may help reduce power consumption and preserve battery life,it may impact the user experience by delaying performance. For example,when a user depresses a button, such as the brush button, the brush headmay not move immediately because the device must first wake from lowpower mode

Indicators may be useful in announcing the status of a device. In someembodiments, indicators, such as lights, may signal to the user that thedevice is ready for use, e.g., that the device is not in low power mode.However, such indicators may increase the rate at which power is drawnfrom the battery.

The information included in this Background section of thespecification, including any references cited herein and any descriptionor discussion thereof, is included for technical reference purposes onlyand is not to be regarded subject matter by which the scope of theinvention as defined in the claims is to be bound.

SUMMARY

In one embodiment, a combination toothbrush and flosser device includesa floss button, a floss switch, a floss light source, a brush button, abrush switch, a brush light source, a motion sensing module fordetecting movement of the device, and a controller for accepting anelectronic signal from the motion sensing module and the switches,exiting or entering a low power mode, and sending an electronic signalto the light sources. In some embodiments, the brush and floss lightsources may be a plurality of light emitting diodes, wherein theplurality of light emitting diodes of the brush light source may be thesame color or a different color than the plurality of light emittingdiodes of the floss light source.

Also disclosed is a method of exiting a low power mode on a combinationtoothbrush and flosser device comprising: initiating a signal from themotion sensing module to the controller in response to movement of thedevice, adding one event to an event incremental counter, exiting lowpower mode, and sending an activation signal from the controller to thebrush light source and the floss light source. The controller may beconfigured to re-enter low power mode if a user input, e.g., in the formof a activated switch, is not detected within a period of time, e.g., 30seconds (referred to as a cancelled wake up), and wherein the controllermay ignore signals from the motion sensing module if the controller hasregistered more than two cancelled wake up events. In many embodiments,the incremental counter is re-set to zero when the controller receives auser input signal from one of the floss or brush switches.

In another example, the disclosure relates to a cleansing device withillumination features. The device includes a housing including anaperture, such as a button aperture, defined therethrough, a diffuserconnected to the housing and configured to span over the aperture. Thedevice also includes a blocking member positioned over a portion of thediffuser and connected thereto and a lighting array received within thehousing and at least partially aligned with the blocking member suchthat light emitted from the lighting array is transmitted to an exteriorof the housing by traveling around the blocking member and through thediffuser.

In yet another embodiment, a dental cleaning tool is disclosed. The toolincludes a housing configured to be held in a hand of a user, a lightingfeature coupled to the housing, a power source in electricalcommunication with the lighting feature and the power source, and amotion sensor in electrical communication with the power source. Inoperation, the controller selectively activates the lighting featureupon detection of one or more motion events by the motion sensor.

This Summary is provided to introduce a selection of concepts in asimplified form that are further described below in the DetailedDescription. This Summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used to limit the scope of the claimed subject matter. A moreextensive presentation of features, details, utilities, and advantagesof the present invention as defined in the claims is provided in thefollowing written description of various embodiments of the inventionand illustrated in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is an isometric view of a cleansing device includingillumination features.

FIG. 1B is a front elevation view of the cleansing device of FIG. 1A.

FIG. 2A is a cross-section view of the cleansing device of FIG. 1A takenalong line 2A-2A in FIG. 1B.

FIG. 2B is an enlarged view of the cross-section of FIG. 2A.

FIG. 3A is a partially exploded view of the cleansing device of FIG. 1A.

FIG. 3B is a partially exploded view of the cleansing device of FIG. 1A.

FIG. 4A is an isometric view of the cleansing device of FIG. 1A with thehousing removed.

FIG. 4B is an enlarged view of the cleansing device of FIG. 4A.

FIG. 5 is a front isometric view of the cleansing device with thehousing removed to illustrate placement of adhesive and a flexiblediffuser with respect to internal features.

FIG. 6 is a front elevation view of a light diffuser for the cleansingdevice.

FIG. 7 is a simplified block diagram of the cleansing device of FIG. 1A.

FIG. 8 is a simplified wiring diagram of the lighting features for thecleansing device of FIG. 1A.

FIG. 9 is a flow chart illustrating a method for activating lightingfeatures for the cleansing device of FIG. 1A.

DETAILED DESCRIPTION Overview

The present disclosure generally relates to a brushing device thatincludes illumination features. The illumination features may correspondto particular functions and/or convey status information to a user. Inone embodiment, the illumination features are arranged as light ringssurrounding one or more function buttons. The light rings are formed bydiffused light from a plurality of light sources, such as light emittingdiodes (LEDs). Conventional light ring effects are formed by placing alight source a far distance from the light window, but with compactdevices, such as a handheld cleaning device, in order to comfortably fitin a user's hand, the separation distance is constrained andconventional light diffuse distances are not possible. Accordingly, tocreate a soft and uniform light appearance, the brushing device includesa combination light diffuser and light pipe that acts to diffuse thelight without requiring a large separation distance, as well as ablocked arrangement of light sources, concealing “hot spots” andcreating a uniform diffused light.

In one embodiment, the light diffuser or light pipe may be a flexiblemembrane positioned between a switch and a button. The light diffuserflexes to allow the button to translate or otherwise move apredetermined distance to activate the switch, e.g., flex sufficientlyto allow the button to compress the switch to turn the device on andoff, while acting to diffuse the light from the light sources. In theseinstances, the light diffuser may be formed as a rubber material duringan overmold process.

Additionally, in some instances the brushing device may include multiplelight sources spaced apart from one another and positioned beneath anopaque surface. This configuration prevents hot spots or the specificlocation of the light source from being determined when viewed from thewindow, as well allows the use of less expensive light sources whosecolors can be mixed by the diffuser to create the desired light effect,as compared to a more expensive pre-mixed light source. In other words,the light sources are blocked by an opaque member, such as a buttonsurface, to ensure that the direct light is not emitted from the device,only the reflected and diffused light that escapes around a perimeter ofthe blocking member.

In some embodiments, the cleansing device may include a button windowformed as contiguous translucent material designed to occupy both buttonopenings as well as connect them. In many embodiments, an opaquestructure may be positioned above one or more parts of the button windowto prevent light from passing through the faceplate. The button ispositioned atop the button window, such that light may pass from theinterior of the housing body through the button window and through thefaceplate to create a line of light outlining the button. In someembodiments, for example where the button window is substantially largerthan the button, or has a significantly different shape, an opaquematerial (for example a tape) may be positioned between the buttonwindow and the faceplate to prevent light from passing from the interiorof the housing body to the exterior. In other embodiments, the faceplatemay be painted or created with opaque materials except for at or nearthe button openings. This embodiment may aid in directing light toescape from around the buttons. In some embodiments, an opaque coatingmay be removed to allow light to pass through the faceplate.

In another embodiment, the brushing device may also include a motionsensing module, which may include one or more motion sensors that may beused to activate one or more light sources and/or wake the device. Thedevice may be configured to activate a particular light source to help auser select the desired function button. In other examples, the motionsensor may automatically activate an “on state” from a low power statebased on detected movement. This helps to prevent delay from a userpicking up the device and the device being ready to begin operating. Themotion sensor may also be used by the device to prevent the device fromwaking when the device is moved, but in situations where a user wouldnot want the device to operate (e.g., when packed in a luggage bag orduring shipping of the product).

The controller is programed to integrate electrical signals receivedfrom the motion-sensing module and the switches, and signals directed tothe light sources and the power source. In most embodiments, thecontroller may cancel a low power mode and activate one or more lightsources after receiving a signal from the motion-sensing module. Thecontroller may and maintain this state for a period of time beforereturning to the low power mode and de-activating the light sources. Ifa first user input is detected (e.g. depression of the floss button)within this period of time (i.e., prior to returning to the low powermode and de-activating the light source), the controller may not allowthe device to return to the low power until a second user input isdetected, and may de-activate the light source illuminating the otherbutton (e.g., the brush button).

The disclosed system allows the device to exit the low power mode priorto user input. In most embodiments, the low power mode may be cancelledwhen the motion-sensing module detects movement of the device. Whenmovement of the device is detected, an electronic signal is sent to acontroller to cancel low power mode, and also to activate an indicatorthat announces to the user that the device is ready to use. If no inputis received from the user (for example, by activating a button after aperiod of time), the device will return to the low power mode toconserve power. In some embodiments, the low power mode may not becancelled if the motion-sensing module has caused the device to cycleout of Low Power one or more times without the controller receiving auser input.

Detailed Description

Turning to the figures, a brushing or cleansing implement of the presentdisclosure will now be discussed in more detail. FIGS. 1 A and 1Billustrate various views of an oral cleansing device 100. FIG. 2A is across-section view of the cleansing device taken along line 2A-2A inFIG. 1B. The device 100 includes a handle 102 having a housing 106 and abrush head 104 operably coupled thereto. The device 100 also includesone or more lighting features 116, 118, 119 that illuminate to providefeedback to a user as discussed in more detail below.

Often, the brush head 104 will be removably coupled to the handle 102 toallow a user to change the brush head 104 and allow multiple users toshare the handle 102. In some instances the cleansing device 100 mayinclude multiple functions, such as an irrigating and brushing function.In these instances, the brush head 104 may include bristles 105 and anozzle 107. However, in other embodiments, the cleansing device 100 mayinclude a single function and may include only bristles 105 or only anozzle 107 or jet tip. Similarly, it should be noted that the featuresdiscussed with respect to the cleansing device 100 can be incorporatedinto other types of small handheld appliances and the specificdiscussion of any particular implementation is meant as illustrativeonly.

With reference to FIG. 2A, the cleansing device 100 may also include apower source, such as one or more batteries 120, a motor 122, and adrive assembly 134. One or more of the components may be connected to achassis 148 to secure them within the housing 106. The batteries 120provide power to the motor 122, which in turn outputs motion that thedrive assembly 134 transfers to a brush shaft 132 and converts themovement into an oscillation or other type of desired motion, which inturn causes the brush head 104 to move accordingly. The cleansing device100 may include a drive assembly 134 such as the one described in U.S.application Ser. No. 15/206,013, titled “Oral Cleansing Device withEnergy Conservation,” which is hereby incorporated by reference herein,for all purposes. Additionally, in instances where the device 100 mayinclude an irrigating function, the device may be fluidly couple to apump and reservoir that provide fluid to the nozzle 107 or optionallythe pump can be housed within the handle housing 106 as shown in U.S.Pat. No. 7,147,468, entitled “Hand Held Oral Irrigator,” which is herebyincorporated by reference, for all purposes, herein. In these instances,the nozzle 107 may output fluid when the irrigating function isselected.

The housing 106 encloses many of the operational components of thecleansing device 100 and is shaped to be held in a user's hand. Often,the housing 106 is selected to have an aesthetically pleasingappearance, as well as a sufficiently small form factor to be heldcomfortably in the hand of most users. The housing 106 often may beshaped as a generally cylindrical member, but with a top portiontapering towards the terminal end. FIGS. 3A and 3B illustrate partiallyexploded views of the device 100. With reference to FIGS. 3A and 3B,housing 106 may also include one or more button apertures 186, 188 thatreceive input buttons 110, 112 and a shaft output 190 defined throughthe top end through which the brush shaft 132 extends. The buttonapertures 186, 188 may be shaped to substantially match the shape andsize of the buttons 110, 112 and in one embodiment may be formed as acircular and oval shaped opening, respectively, and arranged on an upperportion of the handle housing 106.

In some instances, the housing 106 may also include one or more lensrecesses 192, 194. In one example, the first lens recess 192 is formedas a faceplate recess 192 defined on front surface thereof and recessedto accommodate a faceplate 108 for the device 100. In these examples,the first lens recess 192 may extend a substantial length of the frontsurface of the housing and have an oval shape. The second lens recess194 may also include one or more windows 198 a, 198 b, 198 c definedtherethrough and in optical communication with one or more light sourcesas discussed below.

Additionally, in embodiments where the cleansing device 100 includesirrigating features, a hose connection 191 may be defined on a sidewallor rear surface of the housing 106.

The cleansing device 100 may also include an end cap 130 connected to abottom end of the housing 106. The end cap 130 may be used to enclosethe various features of the device 100, as well as to provide connectionto a fluid tube and/or electrically connect the device 100 to a chargingsource, such as a charger in a counter top unit. In one embodiment, theend cap 130 secures the device 100 to a charger to inductively chargethe batteries 120 by electrically connecting them to a permanent powersource, such as a wall outlet.

With reference to FIGS. 2A and 3A, a faceplate 108 is secured to thehousing 106, such as through adhesive pads 154 a, 154 b, 154. Thefaceplate 108 is shape to match the faceplate recess 192 of the housing106 and in one embodiment may have an elongated oval shape that mayextend a substantial length of the front surface of the housing 106. Thefaceplate 108 may also include one or more button apertures 200, 202defined therethrough that correspond to shapes of the input buttons 110,112. The faceplate 108 forms a lens or window for the lighting features116, 118. In these embodiments, the faceplate 108 may be transparent orat least partially transparent to allow light from the light sources ofthe lighting features 116, 118 to be transmitted therethrough.Additionally, decorative accents or the like can be applied or formed inthe faceplate 108 through mold decorating or other similar processes.The configuration of the face plate 108 allows the light sources to beconcealed within the housing 106 presenting a smooth overall surfacewithout raised light features, but still allow the transmission of lightto a user. In some embodiments a portion of the faceplate 108 may bepainted or otherwise obscured, except in desired illumination locations,to further control emission of light from the device.

The cleansing device 100 also includes one or more input buttons 110,112, that connect to one or more switches 140, 150 and allow a user tochange or select one or more functions or characteristics of the device.In one example, the first input button 110 may be used to activateand/or modifying a brushing function (e.g., oscillate the brush head104) and the second input button 112 may be used to activate and/or varyan irrigating function (e.g., expel fluid out of the nozzle 107). Inthese embodiments, the buttons 110, 112 may include distinguishingfeatures, such as tactile elements 114 to assist a user in selecting thedesired function, as well as may include different shapes and/or sizes.

As will be discussed in more detail below, one or more of the buttons110, 112 may correspond to one or more of the lighting features 116,118. For example, in one embodiment, the first input button 110 may betied to the first lighting feature 116, such that the first lightingfeature 116 provides feedback to a user regarding functions associatedwith the first input button 110. Similarly, the second input button 112may be tied to or associated with the second lighting feature 118 suchthat the second lighting features 118 provides feedback or informationto a user regarding functions corresponding to the second input button112.

With reference to FIG. 2B, the input buttons 110, 112 may have aconvexly curved shaped such that a central region of the outer surfaceof the buttons 110, 112 is recessed relative to the outer perimeter.This shape can be selected to correspond to a finger pad of a user'sfinger, making it easy for a user to locate and activate the inputbutton 110, 112. Additionally, each of the input buttons 110, 112 mayinclude a peripheral rim 151 that may be used to secure the buttons 110,112 to the housing 106, as well as a bottom surface of each button 110,112 may include a securing fin 153, the purpose of which is discussedbelow.

The lighting features 116, 118, 119, or lighting assemblies and theirstructures will now be discussed. The lighting features 116, 118, 119 ata general level include a light source, such as a light emitting diode(LED) or the organic light emitting diode (OLED), a lens for directingand optionally diffusing the light, one or more reflectors and lightshields to ensure light is transmitted to only the desired locations.Specific implementations of the various components of the lightingfeatures are discussed with reference to the figures below.

With reference to FIGS. 2A-3B and FIGS. 4A and 4B, the lighting features116, 118, 119 may include a lighting array 142, 152 or light source 128,a diffuser 136 or lens 196, and a light shield 124, 144.

The lighting arrays 142, 152 may include one or more light sources 182,184. The light sources 182,184 may be one or more LEDs and in oneembodiment, the first lighting array 154 includes six LEDs arranged ingenerally circular pattern around switch 150 and the second lightingarray 142 includes seven LEDs arranged in a generally circular patternaround switch 140. The circular arrangement of the light sources 182,184 provides balanced color emitted when viewed collectively. Thenumber, positioning, and arrangement of the light sources 182, 184depends on the desired lighting effect, e.g., for a brighter effect morelight sources can be used. In some embodiments, the spacing relative tothe switch 140, 150 is selected based on the size of the button, whichforms a blocking element for the lights, and so the LEDs may bepositioned sufficiently close to the switch to ensure that they will beoriented behind or beneath the surface of the button 110, 112.

In one embodiment, the light sources 182, 184 may be arranged in pairsand mounted directly to the circuit board 126. The light sources 182,184 are in electrical communication with the battery 120, which providespower to the light sources 182, 184. The multiple light sources 182, 184allow the lighting effects to have a desired color by mixing the lightemitted from differently colored lights, without requiring specializedlight sources that often are more expensive and/or too large for thedesired space.

Further, by combining multiple lights 182, 184 in the lighting arrays142, 154, lower powered light sources can be used, which can help toextend the length of the battery 120 and reduce power consumption forthe device. Additionally, including multiple light sources helps toeliminate any hot spot effects where the origination of the light sourceis visible to a user as compared to a lighting feature, where the lightilluminates around or in a particular arrangement (in one example a“ring” around the buttons 110, 112).

The lighting features 116, 118 may include one or more reflectors 146,180. In one embodiment, the reflectors 146, 180 are coupled to andaround the light sources 182, 184 to direct light away from the circuitboard 126 and towards the face plate 108. The reflectors 146, 180 may besubstantially any type of material that reflects, rather than absorbs,light and may be selected to reflect select wavelengths or allwavelengths. In one embodiment, the reflectors 146, 180 are formed aswhite printed pads or a white printed circuit board solder mask. In thisembodiment, the reflectors 146, 180 form a reflective surface on the topsurface of the circuit board 126. The reflectors 146, 180 may be definedin the same general shape as the layout or arrangement of the lightingarrays 142, 152 (e.g., as shown in FIG. 4B may be generally circular tomatch the circular layout of the light sources 182, 184).

With reference to FIGS. 4A and 4B, the light shields 124, 144 absorb orblock light transmission from the lighting arrays 142, 154. This helpsto ensure that the light is transmitted only in desired directions andprevent inadvertent light mixing or leakage. The top or first lightshield 144 may be arranged as an arcuate member that extends over thecircuit board 126 and is positioned between the top and bottom lightingarrays 142, 154. The light shield 144 or light separator may be formedas a dark colored plastic member that prevents light from the firstlighting array 152 from reaching the second or bottom lighting array 142and vice versa. In some embodiments, the light shield 144 may have acurved outer surface that matches a curvature of the housing 106.

With reference to FIGS. 2A and 4A, the second or bottom light shield 124may be formed as a main body 181 with a post 183 extending downwardsfrom the main body 181. The light shield 124 may include one or moresecuring apertures for receiving fasteners to secure it to the chassis148 and/or circuit board 126. Additionally, the light shield 124includes one or more light windows 125 a, 125 b, 125 c defined asapertures therethrough. The light windows 125 a, 125 b, 125 c may besized and shaped to match with corresponding lights 128 such that lightfrom the light sources 128 can be transmitted through the windows 125 a,125 b, 125 c, but blocked in the remaining directions. As with the lightshield 144, light shield 124 may have a partially curved outer surfacethat at least in part matches an interior curvature of the housing 106.

With reference to FIGS. 3B, the lens 196 may be shaped as a three-prongmember with three circular pads on terminal ends of rungs attached to amain support. The shape of the lens 196 allows for easier manufactureand installation as compared to smaller, individual lenses 196 forindividual light sources 128 (e.g., individual circular padscorresponding to each of the lights 128). However, in other embodiments,each light source 128 may include a separately configured lens, ratherthan the combination lens 196 shown in FIG. 3B.

The lightning features 116, 118 may also include one or more diffusers.In one embodiment, flexible diffuser 136 forms the diffusing element forboth lighting arrays 142, 152. FIG. 6 is a top plan view of the flexiblediffuser 136. As shown in FIG. 6, the flexible diffuser 136 may includetwo diffusion portions coupled together by a bridge 166. The flexiblediffuser 136 forms multiple purposes, function as a diffuser, lightpipe, as well as provide a movable seal that translates with movement ofthe buttons 110, 112 and defines a joint for the buttons 110, 112.

In one embodiment, the diffuser 136 includes a first membrane 162, whichmay have a generally circular shape and include an annular groove 168defined around a perimeter with a diffusing boarder 158 extending outpast the groove 168 to define the periphery of the first diffusingportion. A securing recess 172 may be defined on a section of the firstmembrane 162 and a securing tang 171 may extend from a top wall of thediffusing boarder 158. The bridge 166 extends from a side edge of thediffusing boarder 158 and is formed as a pleated member with a securingtab 174 extending horizontal therefrom and positioned between the twodiffusing sections.

The second diffusing section includes a second membrane 164 surroundedwith an annular groove 170 and a diffusing boarder 160 or diffusing edgeextending outwards from the groove 170 to define the periphery of thediffusing section. A securing recess 178 may also be defined in portionof the membrane 164.

The button membranes 162, 164 are flexible so as to deform and allowmovement of the buttons 110, 112 as the buttons are 110, 112 arecompressed or otherwise activated by a user. For example, the membranes162, 164 may stretch as the buttons 110, 112 are pushed inwards toactivate the switches 140, 150, and then spring back to their originalconfiguration, without tearing. The button membranes and the overallmaterial of the diffuser may be selected to prevent fluids and debrisfrom entering into the internal cavity of the housing.

The diffusing edges or borders 158, 160 are positioned between thelighting arrays 144, 154 and the faceplate and diffuse light before itexits the faceplate 108. The shape and width of the borders 158, 160 maybe selected based on the desired lighting effect.

The diffuser 136 may be formed as an overmold feature that is molded tothe outer surface of the housing 106 to define a waterproof seal for thebutton apertures 186, 188 of the housing 106. For example, a two-shotmolding process can be used. In embodiments where diffusion of the lightis desired, the diffuser 136 may be a translucent color and include acolor that will reflect desired light wavelengths, in one example, thediffuser 136 may be a white color to reflect all of the color spectrum.However, it should be noted that other colors may be selected based on adesired reflection. In one embodiment, the diffuser 136 is athermoplastic elastomer that is translucent white in its natural state.One example, is EASIPRENE DE50600 in NATURAL supplied by ZHI JIN Co.Ltd. However, in other embodiments, the color of the diffuser 136 may beselected by adding a white (or other desired color) pigment to a clearthermoplastic elastomer and correct the quantity to achieve the whiteproperties desired. The mixture ratio of the pigment and the plastic maydepend on the thickness of the material, the desired diffusingcharacteristics, and so on. As an example, as the thickness of thematerial increase, the quantity of white pigment may need to be reducedin order to prevent light blockage.

Connection and operation of the cleansing device 100 and lightingfeatures 116, 118, 119 will now be discussed. With reference to FIG. 2A,the various internal operating components of the device 100 may beinstalled and connected and positioned within the chassis 148. Forexample, the motor 122 and batteries 120 may be positioned within thechassis 148 and operably connected together. The circuit board 120 maybe electrically connected to the battery 120 and then be connected tothe chassis 148, such as being secured to a front surface of the chassis148. The lighting arrays 142, 154 may be connected to the circuit board126 so as to be in electrical communication with the battery 120.

With reference to FIGS. 4A and 4B, in one embodiment, the light arrays142, 154 are secured to the circuit board 126 on top of the reflectors146, 180 or optionally the reflectors may be formed around the lightarrays 142, 154, but in many embodiments, the area surrounding thelighting arrays 142, 154 may be the reflective surface of thereflectors. Each switch 140, 150 may be positioned in a middle area ofthe lighting arrays 142, 154 such that the light sources 182, 184 flankand surround the switches 140, 150, but are spaced away from theswitches 140, 150.

With reference to FIG. 2A, one or more lights 128 may be connected to abottom end of the circuit board 126. In one embodiment, the device 100may include three lights 128 arranged in a linear manner and used tosignal battery strength for the battery 120.

One or more motion sensors 304 and processing elements 302 may bemounted or electrically connected to the circuit board 126 and are inelectrical communication with the battery 120. A simplified diagram andexemplary writing diagram is shown in FIGS. 7 and 8, respectively. Themotion sensor 304 may be an accelerometer, magnetometer, photodiode,gyroscope, or other device capable of detecting movement of the device.In some embodiments, the motion sensor 304 is positioned in a centralregion of the circuit board 126 to enable it to detect motion occurringat various locations of the handle 102.

The processing element 302 or controller may be a microprocessor, anapplication specific integrated circuit, or any other type of devicecapable of controlling other electronic modules in the electronictoothbrush device. In many embodiments, the processor or controller isprogramed to integrate electrical signals received from themotion-sensing module and the switches, and signals directed to thelight sources and the power source. The controller may cancel a lowpower mode and activate one or more light sources after receiving asignal from the motion-sensing module. The controller may and maintainthis state for a period of time before returning to the low power modeand de-activating the light sources. If a first user input is detected(e.g. depression of the floss button) within this period of time (i.e.,prior to returning to the low power mode and de-activating the lightsource), the controller may not allow the device to return to the lowpower until a second user input is detected, and may de-activate thelight source illuminating the other button (e.g., the brush button).Specific examples of the controller function are discussed withreference to FIG. 9.

With reference to FIG. 2A and 4A, the circuit board 126 is mounted tothe exterior surface of the chassis 148. In one embodiment, the circuitboard 126 may extend over a substantial portion of the chassis 148. Whenthe circuit board 126 is secured, the first light shield 144 may beconnected to the chassis 148 and arranged between the first lightingarray 152 and the second lighting array 142. In one embodiment, thelight shield 144 may extend as a bracket over the circuit board 126 andbe anchored at both ends to the chassis 148. The second light shield 124may be connected to a bottom end of the circuit board 123 and positionedto cover various components. The light shield 124 is arranged such thatthe windows 125 a, 125 b, 125 c align with lights 128 on the circuitboard 126.

With reference to FIGS. 3A and 3B, as the device is assembled, thehousing may be formed, such as through a molding process, and thencertain elements may be formed or assembled to the housing. For example,the diffuser 136 is formed and secured to the housing 106, such asthrough a molding process. The first membrane 162 is aligned with andpositioned to expand across the first button aperture 186 and similarlythe second membrane 164 is positioned within and expands across thesecond button aperture e188. Additionally, the bridge 166 and tangs 171,174 are positioned and formed within corresponding recess in thefaceplate recess 192 of the housing 106. Additionally, the lens 196 isformed within and/or coupled to the corresponding lens recess 194 in thefaceplate recess 192 of the housing 106. In one embodiment, the circularpads are positioned over window apertures 198 a, 198 b, 198 c formedthrough the housing 106. It should be noted that the lens 196 anddiffuser 136 act to seal the apertures defined within the housing 106 tohelp prevent liquids and debris from entering into the cavity of thehousing 106.

With reference to FIGS. 2A-3B, the buttons 110, 112 and faceplate 108are coupled to the housing 106. For example, adhesive pads 154 a, 154 b,154c are positioned around the diffuser 136, windows 198 a, 198 b, 198 cand other securing locations in the faceplate recess 192. The buttons110, 112 are positioned over the first membrane 162 second membrane 164,respectively, with the button fins 153 being positioned within thecorresponding securing recess 172, 178 of the diffuser 136 and thebutton edges being positioned in grooves 168, 170. With the buttons 110,112 aligned and secured to the diffuser 136, the faceplate 108 isaligned with the buttons, such that the first button 110 is aligned withbutton aperture 200 and the second button 112 is aligned with buttonaperture 202. Then the faceplate 108 is position within the faceplaterecess 192 and secured to the housing 106 via the adhesive 154 a, 154 b,154 c. Other securing methods may be use in addition to or instead ofthe adhesive, e.g., ultrasonic welding, fasteners, or the like. Thefaceplate 108 clamps the buttons 110, 112 in position such that the rims151 of the buttons 110, 112 are positioned beneath an edge of thefaceplate 108.

With reference to FIGS. 2A and 4A, the assembled chassis 148 is receivedwithin the housing 106, such as through a bottom open end of the housing106. The brush shaft 132 extends through the brush shaft opening 190 atthe top end of the housing 106 and the circuit board 126 is oriented toalign with the location of the faceplate recess 192. In particular,switch 150 is positioned behind a center of the button 110 and theswitch 140 is positioned behind a center of the button 112. As shown inFIG. 2B, due to the constraints of the housing 106 (e.g., that it besufficiently small to be comfortably held in a user's hand), the circuitboard 126 may be positioned a first distance D1 from the interiorsurface of the first membrane 162 and button 110 and positioned a seconddistance D2 from the interior surface of the second membrane 164 andsecond button 112 and/or housing 106. In some instances D1 and D2 may beequal, but in other embodiments may vary. In some embodiments, thesedistances may be below 0.25 inches, such as around 0.109 inches, whichas discussed below is a sufficiently small distance to make dispersionof the light from the light source difficult.

The end cap 130 may then be coupled to the bottom end of the housing 106to secure the chassis 148 and various components within the housing 106.The brush head 104 may be coupled to the brush shaft 132 and extend fromthe top end of the housing 106.

To use the device 100, a user grips the handle 102 around the housing106 and lifts the device 100 off a charging platform, housing, orsurface. As will be discussed below, when the user lifts the device 100,the motion sensor 304 detects the motion and the processing element 302activates one or the lighting features 116, 118, 119. In the example ofthe lighting features 116 and 118, when activated, the lights 182, 184are turned and an begin emitting light of the desired wavelength. Withreference to FIG. 2B, the light wavelengths are reflected by thereflectors 146, 180 off of the top surface of the circuit board 126 andare directed outwards towards the housing 106. Additionally, the lightshield 144 prevents light from light array 152 from intermixing withlight from light array 142 and vice versa. For example, light array 152may be selected to emit a first color (e.g., a green color) and lightarray 142 may be selected to emit a second color (e.g., blue) and thelight shield 144 ensures the colors remain as desired, rather than mixedwith other wavelengths.

The buttons 110, 112 may be opaque or otherwise be configured to preventlight transmission therethrough, so the light is directed through thediffusing borders 158, 160 as shown by the arrows in FIG. 2B. Due to thecolor of the diffuser 136, acts to mix and diffuse the wavelengths. Thismixes the colors from the different lights 182, 184 in each array 142,152, respectively to create the desired output color. The light is thendirected through the faceplate 108, which may be transparent, andappears as a light ring or border around each of the buttons 110, 112.The orientation of the light sources, such as being located behind theopaque button, and the diffuser and light shields, act to emit a welldiffused light where hot spots and the origin of any particular lightsource are obscured. This causes a high end lighting effect, in a smallspace where diffusion of light is difficult, but with inexpensive andeasy to manufacture components.

Then, the user selects one of the functions, such as compressing thebutton 110, and as the user force is exerted, translates horizontallyrelative to a center axis of the housing 106, and moves towards thecircuit board 126. This action, causes the bottom surface of the button110 and membrane 162 to compress the switch 150, activating the desiredfunction. Once the user force is removed, the membrane 162 returns backto its original shape, translating the button 110 in the oppositedirection. Similarly, the button 112 deforms the membrane 164 whencompressed to activate or deactivate the switch 140 and the membrane 164transitions back to its original form, moving the button 112 back to itsoriginal position.

When activated, the respective function of the cleansing device 100turns on. For example, when the brushing function is activated, theprocessing element activates the motor 122, which moves the brush shaft132 and brush head 104 accordingly. Similarly, when the irrigatingfunction is activated, the processing element activates a pump (such asin a countertop unit) to begin delivering fluid through the fluidpathway and out of the nozzle 107.

When charging or at other set times, the processing element activatesthe lights 128, which may correspond to a battery state. In thisexample, once the lights are activated, the light shield 124 directs allof the light through the windows 125 a, 125 b, 125 c and out through thelens 196.

Motion Activated Features

As mentioned, the cleansing device 100 may also include motionactivation for the lighting features 116, 118, 119. In these examples,the lighting arrays 142, 154 may be in electrical communication with aprocessing element 302 or microprocessor that selectively activates thelighting arrays 142, 154 and optionally lights 128 based on motion, userinput, or the like. FIG. 9 illustrates an exemplary flow chart foractivation of one or more of the lighting effects. With reference toFIG. 9, the method 400 may begin with operation 402 and the motionsensor 304 detects motion. For example, the motion sensor 304 may be anaccelerometer that detects an acceleration force it generates a signal.A motion event may be set at a change of acceleration over a setmagnitude and/or a length of time. For example, in one embodiment, amotion event is defined as a change of ±0.133 g₀ (Standard Gravity)and/or one that occurs for any magnitude over 0.3 seconds as detected inany one of the axes of the sensor. However, other magnitude and/or timethresholds may be used as desired, depending on the motion eventdetection desired.

Also, in some instances, a motion event may be an event detected by anelement other than the motion sensor. For example, in some embodiments,a motion event to activate the lighting features may be one such as whenthe device 100 is disconnected from a charger and/or removed from a baseunit. In these instances, the motion event may be an event detected bythe battery or processing element.

Once a motion event is detected in operation 402, the method 400 mayproceed to operation 404 and the motion event is recorded, such as in amemory component 307, counter, or other type of storage element. In someembodiments, the number of motion events occurring is stored or countedand the additional data (e.g., event time and magnitude) may not bestored, but in other embodiments, other data including event time andmagnitude may be stored.

After recordation, the method 400 may proceed to operation 406, in whichthe processing element 302 determines whether an event threshold hasbeen exceeded. For example, the processing element 302 may compare thenumber of recorded motion events against a predetermined eventthreshold. In one embodiment, the device 100 may have a threshold offive motion events, but any threshold may be used and may correspond tothe motion event recordation thresholds (e.g., an increase in motionactivation event thresholds could reduce the number of recorded eventsthresholds, since fewer events would be recorded when the motionactivation threshold increases and vice versa).

If in operation 406, the number of recorded events has been exceeded,the method 400 may proceed to operation 424 in which the processingelement determines whether a reset event has occurred. Alternatively, ifin operation 406, the number of events recorded does not exceed thethreshold, the method 400 may proceed to operation 408. In operation408, the processing element may determine whether a null event has beendetected. A null event is an event that may stop activation of thelighting arrays, even when a motion even occurs.

One example of a null event includes when the lighting arrays 142, 152are already activated, such as through another function or user input,and in these instances there is no need to activate the lighting arrays.As another example, when the motor 122 is on, it is presumed that a useris in the motion of brushing and/or flossing with the handle 102 andtherefore, the motion could otherwise continuously trigger the lightingarrays 142, 152 on and off, which could be annoying to a user, as wellas expend battery life and the user may not easily see the lights giventhe brushing or flossing motions. Another example of a null eventincludes a predetermined time period, such as between 1-5 minutes, aftera function has been selected, such as through a user input to buttons110, 112. In this example, it may be desirable to prevent the lightingarrays from activating when a user will be completing action. In oneembodiment, the lighting arrays may be prevented from activating 3minutes after an irrigating function is selected by the user and 1minute after a brushing function is selected by the user. Yet anotherexample includes when the power handle receives a charge signal, such aswhen the battery 120 is electrically coupled to a charger. Anotherexample includes when the detected motion is within an expected rangefor movement due to brushing or irrigating. In one embodiment, when themotion sensor does not detect a change more than +0.64 g₀ in any of thethree axes for a period of 5 seconds, the processing element mayconsider that a null event has occurred. In this embodiment, the motiontypical of brushing and flossing may be less than or equal to ±0.64 go.However, in other examples, other motion thresholds may be used asdesired.

With reference to FIG. 9, if in operation 406 the motion detectionthreshold is increased or in operation 408 a null event has occurred,the method may proceed to operation 424. In operation 424, the device100 determines whether a reset action has occurred. A reset action is anaction that has been programmed to reset the motion counter, examplesinclude: the device 100 being connected to a charging device (e.g., thebattery 120 receiving a charge signal) and/or when a user input isreceived, e.g., selection of the input buttons 110, 112. If a resetaction has not be detected, the method 400 may proceed to operation 422and a low power state may be activated and the method 400 may proceed toa wait operation 428, end, or may return to a state of detecting motion.

In some embodiments, the low power state is the motion detection stateof the device 100, but in other embodiments, the low power state mayinclude deactivation of the motion sensor 304 to help prevent batterydrain. In some embodiments, the processing element 302 may simply turnthe motion sensor off after certain detected events. For example, when asmall number of motion events have occurred in a select time period. Forexample, if less than 5 motion events occur in a 25 hour period, such asmight occur during shipping, storage, and the like. In these instances,the processing element may turn the motion sensor off to maximizebattery life. As another example, the device 100 may include a voltagelockout where when the power in the batteries 120 is below apredetermined threshold, such as dropping below a minimum safe operatinglevel, the processing element turns the motion sensor off to preventfurther drain of the battery.

With reference again to FIG. 9, if in operation 424 a reset action hasbeen detected, the method 400 may proceed to operation 426 and themotion counter may be reset. Resetting the counter, allows the motionactivated lights to turn back on when certain events occur, even if themotion events would otherwise exceed the threshold to cause deactivationof the lights. This helps to prevent battery charge rundown due tomotion events related to product shipping or travel (e.g., wherenumerous motion events are detected without use), but provides a resetto allow new activation of the lighting features going forward.

After operation 426 and the counter has been reset or if in operation408 no null event occurred, then the method 400 may proceed to operation410. In operation 410, one or more of the lighting features 116, 118,119 are activated, e.g., the light sources are illuminated.Additionally, the device 100 may exit a low power mode and ready thecomponents to receive activation signals from a user.

Once the lighting features 116, 118, 119 are activated, the method 400may proceed to operation 412 and a timer may be activated. For example,in certain embodiments, the motion activated display features (e.g., thelighting features) may be activated for a select time period andoptionally the motion sensor may be deactivated during this time period.In one embodiment, the lighting features may be on for 10 seconds aftera motion activated event; however, other time periods can be selected.

After operation 412, the method 400 may proceed to operation 414 and thedetermines whether an input or charge event is received before time hasexpired. For example, if a user presses an input button 110, 112 orplaces the device 100 on a charger, the method 400 may proceed tooperation 416 and the display is deactivated, e.g., certain lightingfeatures 116, 118, 119 may be turned off. As one example, when the userselects a first input button 110, the device 100 may activate the selectfunction (e.g., brushing or irrigating) and the lighting feature 116,118, 119 corresponding to the select function may remain activated, butthe lighting feature corresponding to the unselected function maydeactivate. This allows the user to visually see via the lightingfeedback which function he or she may have selected.

However, in instances when the input is a charge event that occursbefore the activation time expires, then, all lighting features 116,118, 119 may be deactivated or only the battery signal feature, whichmay be lighting feature 119 may remain activated. After operation 416,the method 400 may end.

If in operation 414, no input or charge event is detected before thelight activation time period has expired, the method 400 may proceed tooperation 420 and enter the low power mode. In the low power mode, thelighting features 116, 118, 119 may be deactivated to converse power.The method then may return to operation 402 and repeat as desired. Thefunction may remain active until a second user input is received, atwhich point the device will be returned to low power mode.Alternatively, the individual functions may have set time limits toautomatically return to low power mode

It should be noted that each of the operations in method 400 may beperformed separately from one another and may be omitted from the methodflow as desired and can be performed in multiple orders andcombinations.

In some examples, the lighting features may form a motion activateddisplay or motion activated lights using one or more of the operationsof method 400. As an illustrative example, when a user lifts the device100 off of a surface the motion sensor 304 may detect the motion eventand/or when the device 100 is disconnected from an electrical source,the motion activated lighting features are activated. The motionactivated lights may include all of the lights on the device, e.g.,battery gauge lights (e.g., light 128) and button light arrays 142, 152.After a motion activated event, the display may be on for a set period,e.g., 10 seconds, and the display will be superseded by a button pressor a charge signal. The device 100 may also include a motion activatedlight counter to record the number of motion events and after a fifthmotion event turns off the display until the counter is reset to zero(reset functions include receiving a charge signal or a user input ofthe function buttons). Once a motion event is detected, the display willbe active (e.g., on) except when: any of the button lights are alreadyon, such as when activated by another function; the brush motor is on,three minutes after an irrigating function button is selected or oneminute after the brushing input is selected; when the device receives acharge signal, when the motion sensor does not detect a change of morethan a use threshold (e.g., ±0.64 g₀) for a select time period (e.g., 5seconds); when the device 100 is in voltage lockout; when the device 100is charging; or in instances where a limited number of events occurduring a select time period (e.g., 5 events in a 25 hour time period).

As another example, upon sensing movement, a motion-sensing module maysignal the controller to cancel the low power mode—which may be referredto as a wake-up. If the device is not in the low power mode, and hasbeen previously woken-up, the controller may be configured to ignore asignal from the motion sensing module. In some embodiments, the movementsensing module may be a piezo electric or similar device, that may, uponexperiencing motion, generate an electrical current and/or signal withlittle or now power. In addition, upon receiving a signal from themotion-sensing module, the controller may activate one or moreindicators to signal to the user that the device is not in the low powermode and is ready for use. In some instances, the device may be movedwithout the user wishing to activate one or more of the devicesfunctions. In these instances, the controller may be configured toreturn the device to the low power mode, e.g., if a user input is notreceived after a pre-set period of time. In some embodiments, thisperiod of time may be less than about 60, 30, 25, 20, 15, 10, 5, 4, or 3seconds. In some instances, where the motion-sensing device has signaledmovement without a subsequent user input in the allotted time (e.g., acancelled wake-up), the controller may be configured to ignoreadditional signals from the motion-sensing module until receipt of auser input. In most embodiments, a user input may be in the form of anactivated button switch. In some embodiments the controller may beconfigured to ignore a signal from the motion-sensing module after 2, 3,4, 5, 6, 7, or 8 cancelled wake-ups. Ignoring signals from themotion-sensing module after 2 or more cancelled wake ups may avoiddraining of the power source when the device without the user intendingto use the device, for example while travelling.

The controller aids in determining whether lights are activated and/orthe low-power mode is exited. In one embodiment, when the motion sensingmodule, which is positioned within the handle body of thetoothbrush/irrigator device, detects movement (indicating that the powerhandle has been moved, or picked up, by the user) an electronic signalis sent to the controller, which is also positioned within the powerhandle body. The controller, in turn, may send a signal to a switchallowing power to flow to one or more lights, thereby illuminating thelights. The controller may also, in response to a signal from the motionsensor, initialize an exit from a low-power mode (i.e., a “wake-upevent”). The controller is also configured to return the device tolow-power mode and/or de-activate the light switches if there is no userinput (for example, depressing at least one button) after apre-determined period of time. In many embodiments, the controller isable to distinguish movement that is not user-based and preventactivation of the light switches and/or cancellation of the low-powermode.

The controller may, after a specified number of cancelled wake-up events(wake-up events not followed by a timely user input), ignore additionalsignals from the sensing module to prevent draining the power source orbattery. This function may be useful when the user is traveling with thedevice or the device is otherwise moved without the user having anintention of using it. Pressing either the brush button or the flossbutton will re-set the controller to allow subsequent signals from thesensing module to initiate a wake up event.

As described above, increasing regulations regarding idle powerconsumption of household electronic devices requires the base unit andthe power handle electronics to be placed in in a low power use mode.Typically, a low power mode prevents automatic wake up of the powerhandle when lifting it off the base unit after charging is complete. Byusing the disclosed system and methods, the user is able to cancel thelow-power mode by simply moving the device. Further, activating themotion sensing module also activates the button lights when the deviceis lifted from the base unit or is picked up from a surface, whichindicates to the user that the brushing and flossing functions of thedevice are ready for activation.

All directional references (e.g., proximal, distal, upper, lower,upward, downward, left, right, lateral, longitudinal, front, back, top,bottom, above, below, vertical, horizontal, radial, axial, clockwise,and counterclockwise) are only used for identification purposes to aidthe reader's understanding of the present invention, and do not createlimitations, particularly as to the position, orientation, or use of theinvention. Connection references (e.g., attached, coupled, connected,and joined) are to be construed broadly and may include intermediatemembers between a collection of elements and relative movement betweenelements unless otherwise indicated. As such, connection references donot necessarily infer that two elements are directly connected and infixed relation to each other. The exemplary drawings are for purposes ofillustration only and the dimensions, positions, order and relativesizes reflected in the drawings attached hereto may vary.

The above specification, examples and data provide a completedescription of the structure and use of exemplary embodiments of theinvention as defined in the claims. Although various embodiments of theclaimed invention have been described above with a certain degree ofparticularity, or with reference to one or more individual embodiments,those skilled in the art could make numerous alterations to thedisclosed embodiments without departing from the spirit or scope of theclaimed invention. Other embodiments are therefore contemplated. It isintended that all matter contained in the above description and shown inthe accompanying drawings shall be interpreted as illustrative only ofparticular embodiments and not limiting. Changes in detail or structuremay be made without departing from the basic elements of the inventionas defined in the following claims.

What is claimed is:
 1. An oral cleansing device comprising: a housingincluding an aperture defined therethrough; a diffuser connected to thehousing and configured to span over the aperture; a blocking memberpositioned over at least a portion of the diffuser and connectedthereto; and a lighting array received within the housing and at leastpartially aligned with the blocking member such that light emitted fromthe lighting array is transmitted to an exterior of the housing bytraveling around the blocking member and through the diffuser.
 2. Theoral cleansing device of claim 1, wherein the blocking member is abutton and is movable relative to the housing.
 3. The oral cleansingdevice of claim 2, wherein as the button moves from a first position toa second position, the diffuser moves therewith.
 4. The oral cleansingdevice of claim 1, wherein the lighting array comprises a plurality oflight sources.
 5. The oral cleansing device of claim 1, furthercomprising a light shield to prevent light transmitting within thehousing in at least one direction.
 6. The oral cleansing device of claim1, further comprising a light reflector positioned beneath the lightingarray, wherein the light reflector reflects light towards the exteriorof the housing.
 7. The oral cleansing device of claim 1, wherein thediffuser comprises a thermoplastic material or a elastomer material. 8.The oral cleansing device of claim 1, wherein the lighting arraycomprises: a plurality of first colored light sources; and a pluralityof second colored light source, wherein first colored light source isarranged to be adjacent to a second colored light.
 9. The oral cleansingdevice of claim 1, further comprising: a motion sensor; and a processingelement in electrical communication with the motion sensor and thelighting array; wherein the processing element activates the lightingarray upon a motion event detected by the motion sensor.
 10. A dentalcleansing tool, comprising: a housing configured to be held in a hand ofa user; a lighting feature coupled to the housing; a power source inelectrical communication with the lighting feature; a controller inelectrical communication with the lighting feature and the power source;and a motion sensor in electrical communication with the power source;wherein the controller selectively activates the lighting feature upondetection of one or more motion events by the motion sensor.
 11. Thedental cleansing tool of claim 10, wherein the lighting featurecomprises: a first lighting array associated with a first function; anda second lighting array associated with a second function.
 12. Thedental cleansing tool of claim 11, further comprising: a brush headreleasably coupled to the housing; a motor positioned within the housingand operably connected to the brush head to move the brush head, whereinthe first function corresponds to movement of the brush head.
 13. Thedental cleansing tool of claim 12, wherein the brush head furthercomprises a nozzle coupled thereto, wherein the second functioncorresponds to a water output through the nozzle.
 14. The dentalcleansing tool of claim 1, wherein the lighting feature is activated fora predetermined time.
 15. The dental cleansing tool of claim 14, whereinwhen a user input is received by the controller during the predeterminedtime, the controller deactivates the lighting feature.
 16. The dentalcleansing tool of claim 10, wherein after detection of a predeterminednumber of motion events, the controller deactivates the lighting array.17. A power handle for a dual-function oral care device comprising: ahandle body comprising; a first button; a second button; a power source;a first switch proximate the first button and a first light source; asecond switch proximate the second button and a second light source; amotion sensing module; and a controller in electrical communication withthe motion sensing module, the power source, the first and secondswitch, and the first and second light source.
 18. The power handle fora dual-function oral care device of claim 17, wherein movement of thedevice causes a signal to be sent from the motion sensing module to thecontroller.
 19. The power handle for a dual-function oral care device ofclaim 17, wherein the first and second light source comprise a pluralityof light emitting diodes.
 20. The power handle for a dual-function oralcare device of claim 19, wherein the plurality of light emitting diodesof the first light source are different than the plurality of lightemitting diodes of the second light source.
 21. A method of cancelling alow power mode on the device of claim 17 comprising: initiating a signalfrom the motion sensing module to the controller; adding a first eventto an event incremental counter; exiting low power mode; and sending anactivation signal from the controller to the first and second lightsource.
 22. The method of claim 21, wherein the controller re-enter lowpower mode if a user input is not detected within 30 seconds.
 23. Themethod of claim 23, wherein the controller may ignore signals from themotion sensing module if the controller has registered more than twoevents.
 24. The method of claim 23, wherein the incremental counter isre-set to zero when the controller receives a user input signal from afirst or second switch.